Table 1.
Percent As removed on the basis of μSXRF data in columns undergoing 10 mM oxalic acid treatment
| Percent As Removed Based on μSXRF Data (%) | ||||
|---|---|---|---|---|
| Experiment | Median | Mean | Standard Deviation |
Modec |
| #90a | 80% | 79% | 9% | 80–85% |
| #87-2b | 84% | 83% | 8% | 85–90% |
a
Each scan took approximately 20 minutes and covered an area of 0.168 mm × 0.168 mm. Total number of pixels = 400.
b
One scan was performed before and one after oxalic acid treatment. The scans covered an area of 0.3 mm × 0.3 mm. Total number of pixels = 930.
c
Most common value was based on histogram transformation of the data points. Data were collected into bins of 5 percentage points.